Bilbao, Spain
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Larena A.B.,Technical University of Madrid | Mateo J.G.,Technical University of Madrid | De Tomas J.A.,IDOM | Uson T.F.,IDOM | Rios R.,R.Rios Ingenieros
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

Recently opened in October 2015 for the World Bank and International Monetary Fund meeting, the Lima Convention Centre (LCC) is a major milestone in South American construction. The building presents a great architectural and structural singularity, and was designed and completed in just one and a half years. LCC has a rectangular shape in plan, with dimensions of 100 x 60 meters, and a total height of around 45 metres above ground. The building required several column-free large spaces, to meet the demands of its use (large meeting rooms and exhibition areas, with the main one located at an upper level and occupying almost the entire floorplate) and its architectural intention, including a large opening that houses an open-air terrace hall. The structure has therefore to accommodate spans of more than 40 metres. In addition, being located in a highly seismic area, the building is subject to significant horizontal forces. The main seismic resistant structure is formed by a very rigid structural macro-system, composed of four big concrete cores and a large steel truss that goes all around the main meeting hall at the upper level. The steel trusses are rigidly connected to the concrete cores, strategically placed close to the corners, creating a system of huge rigid frames in both directions, which provides horizontal stability. This macro-system is complemented by a set of smaller rigid frames located at every level, which contributes to distribute and control horizontal stresses and displacements. The structure combines prefabricated concrete elements below ground and a composite steelconcrete structure above ground, and despite its apparent irregularity and its large openings and extensive spans, responds efficiently to structural and seismic requirements, while enhancing its architectural intentions.

Capellan G.,Arenas and Asociados | Martinez-Aparicio J.,Arenas and Asociados | Merino E.,Arenas and Asociados | Garcia-Arias P.,Idom | And 2 more authors.
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

With a 384 m long main span, this arch bridge sets a new world record as the longest span on a single concrete arch bridge used for high speed trains. Almonte's span is considerable even when compared with non-railway concrete arch bridges. The arch has been erected by cantilever method construction with the aid of temporary cablestays from two temporary steel towers (using form travellers specially designed for this bridge). The deck is constructed using an overhead movable scaffolding system. This article summarizes the site control activities and special operations undertaken during the structure erection, as the monitoring system, the geometrical control and some aspects of calculation related to its construction.

Llarena J.,IDOM | Castro N.,IDOM | Bilbao A.,IDOM
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

The new San Mames Stadium, recently awarded in the World Architecture Festival as the best Sports building completed in 2015, is the new home of football team Athletic Club of Bilbao. Classified as a UEFA Five-Star Stadium, San Mames has been also selected as one of the host venues in the UEFA Euro 2020. The new stadium was placed next to the hundred-year-old San Mames. As both stadiums' footprints overlapped partially, the new stadium had to be built in two phases. Three quarters of the new stadium were built before the old one's demolition began just the day after having hold its last football match. All these constraints posed a major challenge for both structural design and construction management. Hence, the structural concept of the stadium was conceived with the purpose of enabling a fluent and optimum two-phase construction process. A steel roof based in a series of slender cantilever trusses, each one of them aiming at the pitch center and reaching up to 55-meter spans, was selected to support a lightweight cladding composed by ETFE cushions. Each cantilever truss ends in a steel pyramid which balances the destabilizing moments resulting in both axes and transfer them to a couple of composite steelconcrete frames. The stadium envelope is completed by an innovative façade system composed of twisted ETFE fins that are illuminated at night events. Specific aeroelastic wind-tunnel testing were carried out to assess the structural sensitivity of this façade to wind effects. Concern for sustainability was also present during the whole project, which eventually received the LEED certification. This paper describes the structural design carried out by IDOM, the different advanced design & calculation tools used, the specific prototypes and testing performed, as well as the construction management and erection strategies developed.

Murga G.,IDOM | Larracoechea I.,IDOM | Bilbao A.,IDOM
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

The Daniel K. Inouye Solar Telescope (DKIST), formerly the Advanced Technology Solar Telescope (ATST), is a solar telescope currently under construction at the Haleakal? High Altitude Observatory Site in Maui, Hawai'i. When completed, it will be the largest solar telescope in the world, with unprecedented abilities to view details of the Sun. The DKIST dome is the large moveable structure about 26m in diameter and 22m high, which protects the telescope and its instrumentation. During the observation, it rotates together with telescope and positions by means of a large moveable shutter the aperture through which the telescope observes with millimetric accuracy, protecting the telescope and its delicate instrumentation from the wind shaking and the solar radiation. The proposed design is based on a multi-sector shutter system arrangement with an innovative crawler drive system (IDOM patent) assembled on two steel fabricated arch girders. These arch girders supported on a steel fabricated base ring and stiffened by a set of vertical and horizontal steel trusses, the secondary structure. Beneath the base ring a set of bogies with steel wheels allows the rotation of the whole structure. This structure has been designed and optimized so as to ensure the appropriate mechanismstructure interaction and to withstand the Minimum Design Loads for Buildings and Other Structures as defined by ASCE 7-05 for the Site. The later has become a significant design driver as Hawaii is both a hurricane prone area and a seismic active region. This paper describes the design proposed by IDOM for this mechanism and how it has been implemented through the different phases of the Project: Design, Fabrication, Factory Assembly and Testing, Packaging and Transport and Site Assembly and Testing.

Arenas J.J.,Arenas and Asociados | Capellan G.,Arenas and Asociados | Martinez-Aparicio J.,Arenas and Asociados | Merino E.,Arenas and Asociados | And 2 more authors.
IABSE Congress Stockholm, 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment | Year: 2016

The High Speed Railway (HSR) link Madrid-Extremadura crosses over River Almonte with a great arch viaduct of high-performance concrete. The main span of this structure is 384 meters. This paper explains the exceptional techniques and structural analysis outside the usual engineering work that have been developed to reach its design and construction. These studies include the selection of the antifunicular arch axis taking into account construction process and train loads, geometric and material nonlinear analysis, dynamic analysis and aerolastic behaviour.

Gomez C.,IDOM | Aviles A.,IDOM | Bilbao A.,IDOM | Siepe D.,GERB Schwingungsisolierungen GmbH and Co.KG | Nawrotzki P.,GERB Schwingungsisolierungen GmbH and Co.KG
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

During the E-ELT Dome and Foundations FEED Study, IDOM developed a Base Control System for protection of the E-ELT Main Structure against the effect of high level earthquakes. The proposed design was aimed to provide an effective isolation during heavy seismic events, whereas in normal observation conditions it presented a high stiffness to avoid interferences with the pointing accuracy of the telescope. In a subsequent phase, a representative prototype was envisaged by IDOM, in close collaboration with GERB, to evaluate the performance of this system, correlate the results from prototype testing with the behaviour predicted by a calculation model and finally validate the design conceived during the FEED Study. The assessment of the results from the prototype tests has been focused on checking the level of compliance with the demanded requirements: 1) the Base Control System isolates the upper structure from ground in case of high magnitude seismic events; 2) in operational conditions, the system -by means of Preloaded Devices (PLDs)- provides a stiff interface with the ground; 3) regarding the performance of the PLDs, the finite element model simulates accurately the non-linear behaviour, particularly the zero crossing when the direction of the excitation changes; 4) there is no degradation of the stiffness properties of the seismic devices, after being submitted to a heavy seismic event. The prototype was manufactured by GERB and pseudo-integrated tests were performed on a shaking table at the premises of the Institute of Earthquake Engineering (IZIIS) in Skopje, Macedonia. © 2012 SPIE.

Bilbao A.,IDOM | Bilbao A.,Advanced Design and Analysis Group | Aviles R.,Escuela Tecnica Superior de Ingenieria | Aguirrebeitia J.,Escuela Tecnica Superior de Ingenieria | Bustos I.F.,Escuela Tecnica Superior de Ingenieria
AIAA Journal | Year: 2011

Vibratory dynamics of variable geometry trusses (VGT) is studied and a tool is developed to efficiently estimate the dynamic properties of VGTs throughout their movement. A procedure for estimating the variation of natural frequencies and vibration modes of VGTs during their movement, making it unnecessary to recalculate them at all positions but just for a small number thereof, is presented. To calculate the derivatives of modes and frequencies, the stiffness matrix derivatives are calculated with respect to the nodal coordinates. To model the variations of frequencies and modes throughout VGT evolution, linear estimation is used, which obtains natural frequencies and vibration modes in a new position from their values in a previous position. The derivatives of the natural frequencies and vibration modes are calculated in relation to the nodal coordinates for a reference position.

Bilbao A.,IDOM | Murga G.,IDOM | Gomez C.,IDOM | Llarena J.,IDOM
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The E-ELT as a whole could be classified as an extremely challenging project. More precisely, it should be defined as an array of many different sub-challenges, which comprise technical, logistical and managerial matters. This paper reviews some of these critical challenges, in particular those related to the Dome and the Main Structure, suggesting ways to face them in the most pragmatic way possible. Technical challenges for the Dome and the Main Structure are mainly related to the need to upscale current design standards to an order of magnitude larger design. Trying a direct design escalation is not feasible; it would not work. A design effort is needed to cross hybridize current design standards with technologies coming from other different applications. Innovative design is therefore not a wish but a must. And innovative design comes along with design risk. Design risk needs to be tackled from two angles: on the one hand through thorough design validation analysis and on the other hand through extensive pre-assembly and testing. And, once again, full scale integrated pre-assembly and testing of extremely large subsystems is not always possible. Therefore, defining a comprehensive test plan for critical components, critical subsystems and critical subassemblies becomes essential. Logistical challenges are linked to the erection site. Cerro Armazones is a remote site and this needs to be considered when evaluating transport and erection requirements. But it is not only the remoteness of the site that needs to be considered. The size of both Dome and Main Structure require large construction cranes and a well defined erection plan taking into account pre-assembly strategies, limited plan area utilization, erection sequence, erection stability during intermediate stages and, very specifically, efficient coordination between the Dome and the Main Structure erection processes. Managerial issues pose another set of challenges in this project. Both the size of the project and its special technical characteristics require specific managerial skills. Due to the size of the project it becomes essential to effectively manage and integrate a large number of suppliers and fabricators, of very different nature and geographically distributed. Project management plans need to cope with this situation. Also, extensive on site activities require intensive on site organization in line with large construction management strategies. Finally, the technical edge of the project requires deep technical understanding at management level in order to be able to take sound strategic decisions throughout the project in terms of the overall project quality, cost and schedule. © 2014 SPIE.

Bilbao A.,IDOM | Murga G.,IDOM | Gomez C.,IDOM
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

During the last two years a modified baseline design for the E-ELT was developed. The aim of this revision was both to achieve a significant cost saving and to reduce risk on major items. The primary mirror diameter was slightly reduced to 39 m and the total height of the telescope also decreased accordingly. This paper describes the work performed by IDOM under contract with ESO to review the EELT dome and foundations design to match the modified baseline. Detailed design and construction planning, as well as detailed cost estimates were updated for the 39-metre baseline design. In June 2011, ESO Council formally endorsed this modified design as the E-ELT revised baseline. Key redesign drivers are explained and final redesign details of all major subsystems are outlined. In general, the original compact dome design philosophy is maintained and adapted to the new dimensions. Cost optimisation strategies are applied throughout the detailed design update process. Special attention is also given to some specific new items now included in the modified baseline, such as the special ad-hoc seismic base isolation system for the telescope foundation. © 2012 SPIE.

Larena A.B.,Technical University of Madrid | Menendez D.G.,IDOM
Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE) | Year: 2014

Reciprocal frame structures, formed by a set of self-supported elements in a closed circuit, have long been used since antiquity to cover large spans with small elements. The roof structure of the Euskalduna conference centre and concert hall extension in Bilbao, covering an irregular geometry of 3000 m2 with a maximum span of 45 m, presented an interesting opportunity to revisit the concept and to apply these classical systems. Furthermore, its analysis and development led to an interesting discussion on reciprocal frames. They showed great sensitivity of these systems to the local modification of a particular element, establishment of irregular load paths, mobilisation of almost the entire system when locally applying a punctual load and, finally, its large deformability. Besides, reciprocal frames present particular construction complexities and possibilities due to the moderate length of the structural elements, the predominance of shear-only connections and the necessity of the entire system to be completely erected to guarantee its stability. Euskalduna extension, completed in 2012, is one of the largest and a very particular case of irregular reciprocal frame structures built in the world. It shows the formal possibilities and potentiality of reciprocal frames to respond to free and irregular geometries. © 2014 Publishing Technology.

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